Loeenz bommee



-Ll BOMMER. Spring-Hinge.

No. 228,304; Patent ed June1, 1880.

INVENTOR WITNESSES ATTORNEY N PETERS, PHOTO LITHOGRAPX4ERI WASHINGTON, nc.

NHE SrArEs PATENT Fries,

LORENZ BOMMER, OF BROOKLYN, NEW YORK.

SPRING- HINGE.

SPECIFICATION forming part of Letters Patent No. 228,304, dated June 1,1880.

Application filed February 28, 1880.

To all whom it may concern I Be it known that I, LORENZ BQMMER, of thecity of Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Spring- Hinges, of whichthe following is a specification.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved spring-hinge, shown as opened and partly in section. Fig. 2 isa vertical transverse section of the hinge as folded up; and Figs. 3, 4,and 5 are top views of the same, showing it respectively in closed andopen positions.

Similar letters of reference indicate corresponding parts.

The invention relates to improvements in double-acting spring hinges, bywhich the attaching of the hinges to the doors and jambs is facilitatedand the same made stronger and more durable. I

Hitherto carpenters and others have experienced considerabledifficultyin hanging doors by double-acted spring-hinges, owing to theuncertainty as to what depth the door-jamb and door had to be recessedfor the leaves of the hinge. This I have aimed to overcome by providingeach leaf with a gage at the upper and lower ends, by which the depth ofthe recess is clearly indicated.

The invention consists, further, in providing the inclosing-barrel ofeach hinge-section at the upper part with an interior shoulder, on whichthe upper adjustable pintle-socket rests by means of an annular seat, soas to furnish a good support and exert less wear on the same.

Referring to the drawings, A A represent the leaves or wings of myimproved doubleacting spring-hinge, of which one leaf, A, is screwedfast to the jainb of the door, while the other, A, is screwed to thedoor itself.

The leaves are connected in the usual manner by pintles B, which passthrough the pintle-sockets O to theinclosing-barrels D of the swingingconnecting-plate E. The lower pintle-sockets are riveted or otherwisefastened to the barrels, while the upper pintle-sockets turn loosely inthe same and serve to adjust the tension of the actuating-springs, whichare arranged at the interior of the barrels and secured to centerrecesses of the pintle-sockets in the usual manner.

By axially turning the upper sockets with a lever-pin inserted into oneof its radial holes the tension 'of the springs may be increased orrelaxed, as required. 7

For the purpose of guiding the carpenter or other person in hanging thedoor properly to the spring-hinges the leaves are provided at theirupper and lower edges with raised flanges or gages a a, which indicatethe depth of the recesses to be cut into the jamb and door for properlyhanging the door. These gages are cast or otherwise applied to theleaves, and form a simple but very important improvement inspring-hinges. They may also be used with advantage for the commondoubleacting hinges.

The swinging plate E is either cast in one piece with the barrels of thehinge-sections, or it is made of one or more layers of sheet metal,which are riveted or otherwise fastened to the barrels.

The inclosingbarrels D are made of one continuous piece throughout theirentire length without being recessed, so as to interlock with sleeves ofthe leaves, as has been the case heretofore in double-actingspring-hinges.

An interior shoulder or collar, b, is arranged at the upper edge of eachsleeve to give a broader support for the upper pintle-socket, which isprovided with an annular recess of corresponding size. Thissupporting-shoulder prevents the too rapid wear at this point andimparts greater strength to the sleeve.

When the door is thrown into closed position by the action of theinterior springs of the hinge the gages come in contact with each otherabove and below the connecting-plate I E, as shown in Figs. 2 and 3, andhold thus the door reliably to the jamb, admitting thus the closefitting of the door thereto.

Having thus described myinvention, Iclaim as new and desire to secure byLetters Patcut- 1. Inadouble-actingspring-hinge, theleaves or wings ofthe hinge, provided with raised flanges or gages at that side at whichthey are connected to the door and jainb'to gage depth of recess for theleaves, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname,in presence of two Witnesses, this 24th day of February, 1880.

LORENZ BOMMER.

Witnesses PAUL GoEPEL, CARL KARI.

